<div class="btn" 
    (click)='_click($event)'
    [class]='_typeClass'>
    <div class="btn-content">
        <div class="btn-left">
            <ng-content select='.btn-left-content'></ng-content>
        </div>
        <div class="btn-center">
            <ng-content></ng-content>
        </div>
        <div class="btn-right">
            <ng-content select='.btn-right-content'></ng-content>
        </div>
    </div>
</div>